plants survival

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Unit 2: Survival of The Species

Unit 2: Survival of The Species

Lesson 2:Plants

Survival

Lesson 2:Plants

Survival

Various ways of plants

dispersal

Various ways of plants

dispersal

Plants Disperse Their Seeds and Fruits

Plants Disperse Their Seeds and Fruits

Four various types of plants dispersal:

a.by windb.by waterc.by animalsd.by explosive mechanism

Plants Disperse by WindPlants Disperse by Wind

Angsana

Dandelion

Whirling Nut (Gyrocarpus)

Plants Disperse by WindPlants Disperse by Wind

a. These seeds and fruits are disperse by wind

b. They are small, light, dry and have wing-like structure or fine hair.

c. These characteristics help them to be flown far away easily.

Plants Disperse by WaterPlants Disperse by Water

coconut

Pong-pong

a. These fruits are disperse by water. b. They are covered with waxy skin to prevent

water from being entering the fruit.

c. Air spaces in the husk help the fruit to

float.

Plants Disperse by AnimalsPlants Disperse by Animals

a. These seeds and fruits are disperse by animals.

b. Most of these fruits are brightly coloured, fleshy, edible and have smells.

c. The seed are usually hard.

Plants Disperse by Explosive MechanismPlants Disperse by

Explosive Mechanism

a. These fruits disperse their seeds by explosive mechanism.

b. They dry up and burst to push the seeds out from the fruits.

Why plants need to disperse their seeds and fruits ?

• Dispersal of seeds and fruits help to scatter them far away from the parent plants.

• This helps to ensure the survival of plant species.

• Dispersal of seeds and fruits help to scatter them far away from the parent plants.

• This helps to ensure the survival of plant species.

DISCUSSION OF

ANSWERs

DISCUSSION OF

ANSWERs

QUIZTIMEQUIZTIME

QUESTION 1

1. State 4 various ways of plants disperse their seeds and fruits.

a._________ c. ___________

b._________ d. ___________

wind

water

animals

Explosive mechanism

QUESTION 2

2. Which of the following plants disperse their seeds by wind?

A.coconutB.pong pongC.angsanaD.watermelon

QUESTION 3

3. Which of the following plants DO NOT disperse their seeds by wind?

A.angsanaB.balsamC.dandelionD.Whirling nut

QUESTION 4

4. Which of the following plants disperse their seeds by water?

A.mangoB.okraC.chiliD.coconut

QUESTION 5

5. Which of the following plants DO NOT disperse their seeds by animals?

A.Rubber seedsB.mangoC.watermelonD.papaya

QUESTION 6

6. Which of the following plants disperse their seeds by explosive mechanism?

A.dandelionB.okraC.pong pongD.rambutan

QUESTION 7

7. Which of the following is the characteristic of the seeds dispersed by wind ?

A.Cover with waxy skinB.Air spaces inside the seedsC.Colourful seeds and fruitsD.Small and light

QUESTION 8

8. Which of the following is the characteristic of the seeds dispersed by water ?

A.Light and smallB.Wing like structureC.Waxy skin and air spacesD.Good smells and colourful

QUESTION 9

9. Which of the following is the characteristic of the seeds dispersed by animals ?

A.Light and smallB.Good smells and colourful fruitsC.Wing like structureD.Waxy skin and air spaces

QUESTION 10

10. Which of the following is the characteristic of the seeds dispersed by explosive mechanism ?

A.Colourful fruitsB.Good smellsC.Dry up and burstD.Waxy skin and air spaces

QUESTION 11

11. Why plants need to disperse their seeds and fruits?

A.To produce more fruitsB.To make sure them eaten by animalsC.To make sure them disperse far awayD.To ensure the survival of plants

species

WELL DONE

Summary

Plants SurvivalPlants

Survival

Reasons why plants need to disperse their seeds and fruits:1.To ensure the survival of their species

Reasons why plants need to disperse their seeds and fruits:1.To ensure the survival of their species

DispersalCharacteristic of seeds or fruits

Wind

Water

Animals

Explosive mechanism

Small, light , fine hair, wing-like

Covered with waxy skin, air spacesBrightly coloured, fleshy, edible and smelly

Dry up and burst

Dispersal Plants

WindAngsana, dandelion

WaterCoconut, pong

pong

AnimalsMango,

watermelon

Explosive mechanism

Balsam, okra

HOMEWORKHOMEWORK

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